Circulating air curtain device for reducing invasion of cold airflow at tunnel portal section

• Main Authors: GENG JIYING, WANG HENG, GAO YAN, LI HUI, YANG PANPAN, DING YUNFEI, LIU YONGLI, FU FANFAN, XU BEINING, GAO WENXUAN
• Format: Patent
• Language: Chinese; English
• Published: 21.03.2023
• Subjects: BLASTING; EARTH DRILLING; FIXED CONSTRUCTIONS; GALLERIES; HEATING; LARGE UNDERGROUND CHAMBERS; LIGHTING; MECHANICAL ENGINEERING; MINING; NON-POSITIVE DISPLACEMENT PUMPS; POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS; SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, ORDRAINING IN OR OF MINES OR TUNNELS; SHAFTS; TUNNELS; WEAPONS

The utility model discloses a circulating air curtain device for reducing cold airflow invasion at a tunnel portal section. The circulating air curtain device comprises a tunnel, a portal thermal insulation structure, an exhaust opening, an air outlet, an exhaust fan set, a sensor set, a PLC and an air inlet channel. The portal heat preservation structures are located at the two ends of a tunnel portal and used for preventing external cold airflow from invading. The sensor group is located in the thermal insulation structure of the tunnel portal, is electrically connected with the PLC and is used for monitoring the wind speed, the wind direction and the temperature and sending data to the PLC; the suction opening is formed in the connecting end of the tunnel portal heat preservation structure and a tunnel, the air outlet is formed in the other end of the tunnel portal heat preservation structure, the suction opening and the air outlet are connected through an air inlet channel, the air inlet channel is formed